我正在使用我自己的類中使用multimaps的項目,我已經遇到了段錯誤。以下是我的代碼中與該問題有關的部分。我真的很感謝一些幫助。謝謝。插入到multimap導致段錯誤
這裏是database.h
#include <iostream>
#include <map>
using namespace std;
class database{
public:
database(); // start up the database
int update(string,int); // update it
bool is_word(string); //advises if the word is a word
double prox_mean(string); // finds the average prox
private:
multimap<string,int> *data; // must be pointer
protected:
};
這裏是database.cpp
#include <iostream>
#include <string>
#include <map>
#include <utility>
#include "database.h"
using namespace std;
// start with the constructor
database::database()
{
data = new multimap<string,int>; // allocates new space for the database
}
int database::update(string word,int prox)
{
// add another instance of the word to the database
cout << "test1"<<endl;
data->insert(pair<string,int>(word,prox));
cout << "test2" <<endl;
// need to be able to tell if it is a word
bool isWord = database::is_word(word);
// find the average proximity
double ave = database::prox_mean(word);
// tells the gui to updata
// gui::update(word,ave,isWord); // not finished yet
return 0;
}
這裏是TEST.CPP
#include <iostream>
#include <string>
#include <map>
#include "database.h" //this is my file
using namespace std;
int main()
{
// first test the constructor
database * data;
data->update("trail",3);
data->update("mix",2);
data->update("nut",7);
data->update("and",8);
data->update("trail",8);
data->update("and",3);
data->update("candy",8);
// cout<< (int) data->size()<<endl;
return 0;
}
非常感謝。它編譯並運行到cout << "test1" << endl;
,但在下一行中有segfaults。
生鏽
'delete',不是'free()',因爲它被分配了'new'。 – Yexo 2011-04-12 18:25:57
哎呀!謝謝。習慣的力量(使用'malloc')。 – 2011-04-12 18:32:11
它工作。真棒。非常感謝你。 – Rusty 2011-04-13 00:20:07